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The ornamental design for office chair, as shown and described.
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FIG. 1 is a perspective view of office chair showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevationalview thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
| Patent | Priority | Assignee | Title |
| D491394, | May 14 2003 | Hsiu-Hsueh Wu | Combined chair seat/backrest |
| D491395, | May 14 2003 | Hsiu-Hsueh Wu | Combined chair seat/backrest |
| D491396, | May 14 2003 | Hsiu-Hsueh Wu | Combined chair seat/backrest |
| D491397, | May 14 2003 | Hsiu-Hsueh, Wu | Combined chair seat/backrest |
| D540554, | Mar 31 2006 | Wonderful Year Co., Ltd. | Chair |
| D587914, | Jan 28 2008 | MILLERKNOLL, INC | Chair |
| D653871, | Aug 03 2009 | Skeie AS | Chair |
| D853163, | May 15 2017 | BOCK 1 GMBH & CO KG | Office chair |
| D948228, | Oct 20 2020 | 39F USA INC | Seat and back of chair |
| Patent | Priority | Assignee | Title |
| D400018, | May 28 1997 | HNI TECHNOLOGIES INC | Chair |
| D405283, | Mar 05 1998 | HNI TECHNOLOGIES INC | Chair |
| D407576, | Apr 30 1997 | PNC BANK | Chair |
| D407911, | Sep 26 1996 | Vitra Patente AG | Chair |
| D418316, | Apr 29 1998 | Klober GmbH | Office chair |
| D423261, | Dec 11 1998 | PNC BANK | Chair |
| D446396, | Jun 09 2000 | HNI TECHNOLOGIES INC | Chair |
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